package br.siteep.servlet;

import br.siteep.conexao.Conexao;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Login extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        String usuario = request.getParameter("usuario");
        String senha = request.getParameter("senha");
        
        String usuarioBanco = null;
        String senhaBanco = null;
        
        ResultSet rs;
        PreparedStatement ps;
        
        try {
            
            Connection con = new Conexao().getConnection();
            ps = con.prepareStatement("SELECT * FROM login;");
            rs = ps.executeQuery();
            
            boolean a = false;
            
            while(rs.next()){
                
                usuarioBanco = rs.getString("usuario");
                senhaBanco = rs.getString("senha");
                
                if(usuario.equals(usuarioBanco) && senha.equals(senhaBanco)){
                    
                    a = true;
                    
                    request.setAttribute("usuario", usuario);
                    request.setAttribute("senha", senha);
                    
                    RequestDispatcher rd = request.getRequestDispatcher("home.jsp");
                    rd.forward(request, response);
                    
                }
                
                else{
                    a = false;
                }
                
            }
            
            if(a == false){
                
                out.println("<html>");
                out.println("<head>");
                out.println("</head>");
                out.println("<body>");
                out.println("<script>");
                out.println("alert('Usuário ou senha incorretos...')");
                out.println("history.back();");
                out.println("</script>");
                out.println("</body>");
                out.println("</html>");
                
            }
            
            
        } catch (SQLException ex) {
            Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
